We just received our first shipment of the new Tungsol 7591 power tubes. This new Tung-Sol 7591 Vacuum Tube might not sound familiar to today’s audiophile, but if you’re a vintage audio buff you’ll know them well.  In fact, chances are your old Fisher or Scott stereo receiver needs four new 7591A tubes to revive it to its former glorious sound!  And if you own an old Ampeg Jet or Reverbrocket guitar amp, the Tung-Sol 7591-A is a fantastic option for these old treasures.